CONTROLLED METHOD FOR APPLYING COATING MATERIALS TO COMPLEX HEAT TRANSFER SURFACES

• US 20190309431A1
• Filed: 06/12/2019
• Published: 10/10/2019
• Est. Priority Date: 12/02/2014
• Status: Active Grant

• Current Assignee: Oceanit Laboratories, Inc.
• Original Assignee: Oceanit Laboratories, Inc.
• Inventors: ARUMUGAM, Ganesh Kumar, VEEDU, Vinod, NAKATSUKA, Matthew
• Granted Patent: US 11,085,125 B2
• Time in Patent Office: Days
• CPC Class Codes: B08B 13/00 Accessories or details of general applicability for machines or apparatus for cleaning
• CPC Class Codes: C23C 18/1619 Apparatus for electroless plating
• CPC Class Codes: C23C 18/1637 metallic substrate
• CPC Class Codes: C23C 18/165 Multilayered product layered product B32B
• CPC Class Codes: C23C 18/1653 Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating
• CPC Class Codes: C23C 18/1662 Use of incorporated material in the solution or dispersion, e.g. particles, whiskers, wires
• CPC Class Codes: C23C 18/1689 After-treatment
• CPC Class Codes: C23C 18/1827 only one step pretreatment
• CPC Class Codes: C23C 18/32 Coating with nickel, cobalt or mixtures thereof with phosphorus or boron C23C18/50 takes precedence
• CPC Class Codes: C23C 18/48 Coating with alloys
• CPC Class Codes: C23G 1/02 with acid solutions
• CPC Class Codes: C25D 15/00 Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
• CPC Class Codes: C25D 5/06 Brush or pad plating
• CPC Class Codes: C25D 5/48 After-treatment of electroplated surfaces

Abstract

A multifunctional coating method involves cleaning a surface, applying a layer of corrosion-resistant alloy coating to the surface, and applying an oleo-hydrophobic composite coating over the corrosion-resistant alloy coating. An oil and gas pipe has an inner surface with a multifunctional coating applied using the multifunctional coating method, and has an inner oleo-hydrophobic composite coating, beneath the inner oleo-hydrophobic composite coating a corrosion-resistant alloy coating, and beneath the corrosion-resistant alloy coating untreated pipe or any other metallic substrate.

Claims

1. A method for applying a multifunctional coating to a metal surface, the method comprising:

cleaning the metal surface;

applying a layer of corrosion-resistant alloy coating to the metal surface by at least one of electroless plating, brush plating, and electroplating;

modifying and functionalizing the layer of corrosion-resistant alloy coating by chemical and/or electrochemical etching and attachment of hydroxyl, epoxy, acrylic, or amines functional groups, prior to application of an oleo-hydrophobic composite coating; and

applying the oleo-hydrophobic composite coating over the corrosion-resistant alloy coating.

2. The method of claim 1, wherein the metal surface is part of a heat exchanger.

3. The method of claim 2, wherein the heat exchanger is located in a power plant.

4. The method of claim 1, wherein the corrosion-resistant alloy comprises at least one of nickel, nickel-phosphorous, nickel-cobalt, nickel-boron, nickel-PTFE, and chromium.

5. The method of claim 1, wherein the oleo-hydrophobic composite coating comprises corrosion-resistant nanoparticles embedded in perfluorinated and/or fluorinated polymer.

6. The method of claim 1, wherein the oleo-hydrophobic composite coating further comprises ceramic nanoparticles embedded in the coating matrix.

7. The method of claim 6, wherein the ceramic nanoparticles comprise at least one of silica, alumina, titania, and ceria nanoparticles.

8. The method of claim 6, further comprising functionalizing the embedded nanoparticles by attaching at least one of perfluoro octyl trichloro silane, perfluoro octyl phosphonic acid, perfluoro polyhedral oligomeric silsesquioxanes (POSS), trichloro octa decyl, trichlor octyl silane, perfluorosiloxane, fluorohydrocarbon, fluorinated silane, fluorinated acid, amine, phosphoric acid, alcohol, acrylates, epoxy, ester, ethers, sulfonate, and/or fluorinated or non-fluorinated monomers.

9. The method of claim 1, wherein the oleo-hydrophobic composite coating further comprises metallic nanoparticles embedded in the coating matrix.

10. The method of claim 9, wherein the metallic nanoparticles comprise at least one of nickel, copper, and iron nanoparticles.

11. The method of claim 1, wherein the oleo-hydrophobic composite coating comprises perfluorinated polymers.

12. An applicator for applying a multifunctional coating to a metal surface, wherein the applicator applies the multifunctional coating according to a method comprising:

cleaning the metal surface;

applying a layer of corrosion-resistant alloy coating to the metal surface by at least one of electroless plating, brush plating, and electroplating;

modifying and functionalizing the layer of corrosion-resistant alloy coating by chemical and/or electrochemical etching and attachment of hydroxyl, epoxy, acrylic, or amines functional groups, prior to application of an oleo-hydrophobic composite coating; and

applying the oleo-hydrophobic composite coating over the corrosion-resistant alloy coating;

wherein the applicator contains the oleo-hydrophobic composite coating.

13. The applicator of claim 12, wherein the metal surface is part of a heat exchanger.

14. The applicator of claim 13, wherein the heat exchanger is located in a power plant.

15. The applicator of claim 12, wherein the corrosion-resistant alloy comprises at least one of nickel, nickel-phosphorous, nickel-cobalt, nickel-boron, nickel-PTFE, and chromium.

16. The applicator of claim 12, wherein the oleo-hydrophobic composite coating comprises corrosion-resistant nanoparticles embedded in perfluorinated and/or fluorinated polymer.

17. The applicator of claim 12, wherein the oleo-hydrophobic composite coating further comprises ceramic nanoparticles embedded in a coating matrix.

18. The applicator of claim 17, wherein the ceramic nanoparticles comprise at least one of silica, alumina, titania, and ceria nanoparticles.

19. The applicator of claim 17, wherein the method further comprises functionalizing the embedded nanoparticles by attaching at least one of perfluoro octyl trichloro silane, perfluoro octyl phosphonic acid, perfluoro polyhedral oligomeric silsesquioxanes (POSS), trichloro octa decyl, trichlor octyl silane, perfluorosiloxane, fluorohydrocarbon, fluorinated silane, fluorinated acid, amine, phosphoric acid, alcohol, acrylates, epoxy, ester, ethers, sulfonate, and/or fluorinated or non-fluorinated monomers.

20. The applicator of claim 12, wherein the oleo-hydrophobic composite coating comprises metallic nanoparticles embedded in a coating matrix

21. The applicator of claim 20, wherein the metallic nanoparticles comprise at least one of nickel, copper, and iron nanoparticles.

22. The applicator of claim 12, wherein the oleo-hydrophobic composite coating comprises perfluorinated polymers.

23. The applicator of claim 12, wherein the applicator contains the corrosion-resistant alloy coating.